ISO 361 is a safety standard on ionizing radiation symbols.
ISO 361 specifies the symbol to be used to signify the actual or potential presence of ionizing radiation and to identify objects, devices, materials, or a combination of materials that emit ionizing radiation.
For the purposes of ISO 361, ionizing radiation includes gamma and X-rays, alpha and beta particles, high-speed electrons, neutrons, protons, and other nuclear particles but not sound or waves, or visible, infra-red, or ultra-violet light.
Note: ISO 361 does not specify the radiation levels at which the symbol is to be used.
ISO 361 on ionizing radiation symbol is relevant to:
The basic ionizing radiation symbol is used or displayed only to signify the actual or potential presence of ionizing radiations.
Appropriate wordings or other symbols are used in association with the basic ionizing radiation symbol to indicate the nature of the source of radiation, type of radiation, limits of occupancy, and similar precautionary information but shall not detract from the clarity of the basic symbol. ISO 361 recommends that additional symbols should be limited to those symbols adopted by international organizations for specific purposes.
Overall, ISO 361 is beneficial as it provides guidance on the basic ionizing radiation symbol which can help improve quality of your products.
EN ISO 361:2015